Reflexive firewalls?

[Ong Chin Kiat <ong.chinkiat () gmail com>]

Hi list,

I've recently used an SSH server that had an interesting authentication 
mechanism. You first had to telnet to the machine on a certain port. 
After doing this (it will just time out - no prompt), you then SSH to 
the server in question. The telnet step has to be carried out, if not 
SSH will just time out.

My question is, is this called reflexive firewalling, and can I 
duplicate this with iptables?

Thanks.